Now that I have to tear the primary cover off of the Blackhawk again, I decided that I'm going to replace the clutch plates/springs and counter-shaft sprocket while I'm in there playing. So I decided to go ahead to play with the gearing spreadsheet and CeD/MPH/HP calculator. With the way the engine is built and tuned, I'm guessing I have close to 45hp at the block. I need 42hp to to hit 105mph, so I went with that figure. I took all my magic numbers and started plugging them in and this is what I came up with.
All the important numbers are highlighted in red and yellow. With the 21 tooth sprocket I should be able to cruise at 70mph at less than 4000 RPMs, which should make it much more capable of cruising down the Interstate without having to worry about getting killed by stupid cagers. Also, I should be able to redline right around 107mph.
Best part is at normal 55mph speeds I'll putting cruising nicely at only 3000 RPMs.
Scottie